With liberrc you can easily find accuracy of calculations. Liberrc is a C++ library that implements ErrorValue class, which automatically calculates error. Also, there are implementation of functions for ErrorValue.

You can download liberrc v1.0-beta here

This lib is written in C++17, but has some code in C++2a. You can turn experimental C++2a code using -D LIBERRC_CPP2A_SUPPORT compiler argument, but C++2a code has not been tested. Any compiler at the moment (febrary 2020) does not support this code. C++2a features used:

• Concepts
• Consistent comparison (operator<=>)
• [[nodiscard]] with class constructors
• [[unlikely]] attribute

You probably will be able to compile C++2a version with g++ 10.0. C++17 version could be compiled with g++ 8.0+ or clang 10.0+, but tested only with g++ 9.2 and clang 11.0.

• ErrorValue class can work with value with any C++ arithmetic type except bool, error can be float, double or long double
• All default C++ arithmetic operators are overloaded in ErrorValue
• Passing ErrorValue class to std::ostream
• Almost all functions have own version which work with ErrorValue

• ErrorValue for complex numbers (std::complex) (v2)
• Supporting more accurate types than long double (v3)

To include library just put "errc.h" file into your project's folder and include it. Library is header-only. For more info see wiki.

You can freely contribute to our github. There're many things you can do: fix bugs, add new features. Please follow several simple rules:

• DO NOT commit to master, use develop or create your own branch instead
• Create one issue per one bug
• Do not duplicate issues
• Specify OS and the compiler you are using in issues
• Specify steps to reproduce the issues
• Create one pull request per one feature
• Create one commit for one small piece of implementation
• Write simple functions. Every function must do one small thing. All actions in function must be on one abstraction level
• Do not use using namespace without valuable reason
• Write docs if it's needed
• Write unit tests for your code (googletest) and put it in "unittests" folder
• Place copyright and license header in top of every file, you can find example in any project source file
• Before starting pull request, run all unit tests to make sure that you did not break anything
• Add your name to list of contributors in end of this file

Also, feel free to update or translate project's GitHub wiki or send your ideas and proposals here.

liberrc is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

liberrc is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU General Public License and GNU Lesser General Public License along with liberrc. If not, see https://www.gnu.org/licenses/.

• Project releases
• Latest stable source code
• Latest non-stable source code
• GNU LGPL v3 text
• Documentation
• Report bug

Copyright (C) 2018 Nikita S., All Rights Reserved
For any questions contact <[email protected]>
Project team:

• Nikita Serba <[email protected]>

Contributors: